https://www.staples.com/sharpie-s-g...int-black-ink-2-pack-2096156/product_24476914 2-Pack Sharpie S-Gel Retractable Gel Pen (Medium Point, Black Ink, 2096156) for Free w/ Any Purchase. Select free store pickup where stock permits, otherwise shipping is free on $35+ orders (total after free pen discount).